Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o maior número de voltas lideradas com o chassi lotus-ford 34/3?
 ###Tabelas: CREATE TABLE average_scores_of_all_couples (average_scores_of_all_couples_id AUTO_INCREMENT PRIMARY KEY, Rank by average VARCHAR, Place VARCHAR, Perfect 40s VARCHAR, Total VARCHAR, Number of dances VARCHAR, Season VARCHAR, Average VARCHAR) CREATE TABLE indy_500_results (indy_500_results_id AUTO_INCREMENT PRIMARY KEY, Year INT, Car number INT, Start INT, Qual. speed VARCHAR, Speed rank INT, Finish INT, Laps completed INT, Laps led INT, Race status VARCHAR, Chassis VARCHAR) CREATE TABLE round_five (round_five_id AUTO_INCREMENT PRIMARY KEY, Pick # INT, CFL Team VARCHAR, Player VARCHAR, Position VARCHAR, College VARCHAR) CREATE TABLE fluctus (fluctus_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Latitude VARCHAR, Longitude VARCHAR, Diameter (km) VARCHAR, Year named INT, Name origin VARCHAR) CREATE TABLE human_resource_development (human_resource_development_id AUTO_INCREMENT PRIMARY KEY, Region VARCHAR, Physician (GP & specialist) INT, Physician : Population Ratio VARCHAR, Health Officer INT, HO : Population Ratio VARCHAR, All Nurses INT, Nurse : Population Ratio VARCHAR, Mid-wives VARCHAR, Mid Wife: Population Ratio VARCHAR, HEW* VARCHAR)  
SELECT MAX Laps led FROM indy_500_results WHERE Chassis = Lotus-Ford 34/3